Alexander dunbar



(No Model.)

A. DUNBAR. APPARATUS FOR HEATING GASK STAVES. No. 442,219.

Patented Dec. 9, 1890.

W, m). VOW a" w: mmms FIZYERS ca, Pwcro-u'mm, msnmamm 0v :2.

nitric TATES PATENT OFFICE.

ALEXANDER DUNBAR, OF LIVERPOOL, ENGLAND.

APPARATUS FOR HEATING CASK-STAVES.

SPECIFICATION forming part of Letters Patent No. 442,219, dated December 9, 1890.

Application filed October 10, 1888. Serial No. 287,730- (No model.) Patented in England July 28, 138 1 ,5 6; in France May 11, 1887.110 183,504=; in Germany May 28, 1887,110- 41,720; in Belgium July 4,1887, No. 78,064,a11di11 Spain November To aZZ whom it may concern.-

Be it known that 1, ALEXANDER DUNBAR, of Liverpool, in the county of Lancaster, England, have invented a new and useful Improvement in Apparatus for Heating Gask- Staves, (for which I have obtained patents in Great Britain, No. 9,516, dated July 23, 1886; in France, No. 183,5 4, dated May 11, 1887; in

lermany, No. 11,720, dated May 28, 1887; in Belgium, No. 78,001, dated July at, 1887, and in Spain,l.\ o. 11,758, dated November 20, 1887;) and I declare the following to be a full,clear, and exact description thereof.

My invention relates to amoaratus for-heating cask-staves,its objectbeing to providea simple and durable apparatus capable of rapidly and uniformly heating cask-staves, so as to render them pliable and lit for bending to shape to form the finished casks.

To these ends my invention consists in certain improvements and combination of parts, all of which will be more fullyhereinafter set forth.

To enable others skilled in the art to make and use my invention, I will describe the same more fully, referring to the accompanying drawings, in which Figure 1 is a vertical section of my improved apparatus; Fig. 2, a plan view, and Fig. 3 a horizontal section on the line no a, Fig. 1.

Like letters indicate like parts in each.

I11 the drawings, a is a circular platform mounted on the axis or pivot b, said axis or pivot being journaled in the fixed foot-step c in suitable bearings and adapted to rotate therein. The base (L is further supported at or near its circumference by the idle-rollers d, journaled in suitable brackets 0, one of said rollers, as at d, being arranged to be driven by the driving-pulleyf, mounted on the same shaft f as the roller d. As the the roller (1' is in close contact with the under surface of the platform a, when the pulley f is driven by power applied thereto and said power is transmitted to the roller (1 the friction between the roller d and the platform a will cause said platform to rotate on its axis 1), while the idle-rollers d will also rotate with it and support it. A chain-Wheel s is secured to the foot-step c, and around said chain-wheel passes the chain 2f, said chain also passing around the chain-wheels u, as shown in Fig. 8. These chain-wheels u are mounted on the vertical spindles n, which are journaled in suitable journals 20 secured to the platform 5 5 e. To the upper ends of the vertical spindles u, are attached the tables 1*, arranged to carry the staves m to be heated. Firmly secured to the platform a is the pillaror standard g, which supports the chimney g at the top thereof. To the lower end of the chimney g are attached the branches or arms h, to which the stove-pipes j are secured. To further support the stovepipe j, tie-bars j are provided to connect the said stove-pipes to the pillar or standard g. Pipes 7c are adapted to move freely within the pipes j, forming a telescopic connection therewith, and are suitably secured at their lower ends to the tops of the stoves Z, which are circular in form and of any suitable construction and provided with grate-bars n, charging-way p, and dampers q. \Vires or chains 9' are secured at one end to the top of the stoves Z, and thence pass up over suitable pulleys 7", journaled in the tie-bars j, while weights '1' are secured to the other endsof said chains, which serve to hold the stoves l in their elevated position, as shown in the right of Fig.1.

In the operation of myimproved apparatus tires are first kindled in the stoves Z, and by means of the chains 0' and the pulleys r the said stoves are raised, the pipes 7.; moving up within the stove-pipes j until the stoves are in the position shown on the right of Fig. 1,

where they are held by the weights 0*. The staves m to be heated are then built up or placed on the tables 1; in the form of casks, and when these staves have been thus built up the stoves Z are lowered into the midst of c the staves, but do not rest upon the tables 0, as the weights r are so arranged as to balance the said stoves a slight distance above the tables, as shown in the left of Fig. 1. By

means of power applied to the driving-pulley 5 As the tables 12 I00 move around with the platform a, the spindles u, journaled in said platform, and the chain-wheels u, secured to said spindle, will necessarily move with said platform aaround a common center; but since the chain-wheels u and the chain-Wheel s are connected by the chain t, as shown in Fig. 3, the effect of this rotary motion of the spindles u and the chainwheels 10 with the platform a will be to cause the spindles u to revolve in their hearings in the platform Cb, so giving to the tables 11 a rotation independent of the rotation they receive from the platform a.

I find the most convenient form of my improved apparatus to be that in which four stoves and a corresponding number of stavecarriers are employed, as shown in Fig. 3. In this form of apparatus when the staves have been built up and the platform rotated the operator, standing in one position, can then remove the heated staves from the carriers and place the staves to be heated thereon as the several carriers are presented to him by the rotation of the platform. During the time taken for the main platform to make one complete revolution the staves are sufficiently heated and ready to be removed, While an even and regular temperature is given to all the staves.

WVhat I claim as my invention, and desire to secure by Letters Patent, is

1. In an apparatus for heating cask-staves, the combination, with two or more stoves adapted to be raised and lowered, of a rotating platform having two or more stave-carriers mounted thereon, and mechanism for rotating said stave-carriers each upon its own axis from the central axis of the rotating platform, substantially as and for the purposes setforth.

2. In an apparatus for heating cask-staves, the combination, with two or more stoves Z, adapted to be raised and lowered, of the rotatin g platform a, the stave-carrierso, mounted thereon, the spindles u, journaled in the platform a, chain-Wheels u, mounted on said spindles, and the chain 2, connecting the said chain-Wheels u and the central chain-wheel s, substantially as and for the purposes set forth.

In testimony whereof I, the said ALEXAN- DER DUNBAR, have hereunto set my hand.

ALEXANDER DUNBAR.

Witnesses:

W. B. JOHNSON, J. JOHNSON. 

